Прасинотибетский: *n[ǝ]
Значение: time or place of, when
Тибетский: na year (?); stage of life, age; when.
Качинский: (H) na, čǝna to extend in time; cf. also na loc. or abl. suffix.
Лушей: niaʔ at the time of; when; -na the place of or where, instrument of or for etc.
